Hammer-drill.



A. H. TAYLOR HAMMER'DRILL. Y

APPLIGATION FILED FEB. 24, 1909.

, 992,45 Pa tentedMay 16,1911.-

fly! E 1%?" I I l 4 (5 4 v 6 UNITED STATES PATENT ALBERT H. TAYLOR, OF EA STON, PENNSYLVANIA, ASSIGNOB TO lNGrERsoLL RAND COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

HAMMER-DRILL.

'11) all whom it mayconcern: I

Be it known that I. ALBERT H. TAYLOR, a citizen of the United States, and resident of Easton, int-he county of Northampton jects to provide certain improvements in the construction, form and arrangement of the several parts at the front end of the drill whereby the leakage of the pressure fluid around the drill steel within the front head is prevented thus insuring a constant.

represents in side elevation the front end end engaged by the anvil block 2.,' This bore 7 is madeto conform to the cross sec-.

of a hammer drill embodying this invention, Fig. 2 is a longitudinal central section through the same, taken in the plane of the line A-A of Fig. 1, Fig. '3 is a front end view of .the drill, the drill steel being shown in section, Fig. 4 is a 'transversesection taken in the plane of the line B-B of Fig. 2. Fig. 5 is a viewin perspective of the chuck, Fig. 6 is aview in perspective of the elastic washer, Fig. 7 is a view in perspective of the washer protecting plate, Fig," 8 is a cross section through the tapered undivided chuck, and Fig. 9 isa face view of the protecting ring.

The hammer cylinder is denoted by 1 and its anvil block by 2. The front head 3 is screwed onto the front end of the hammer cylinder 1 and is locked in position by a clamping ring 4. The front head 3 is provided with a flaring bore 5 within which is seated a tapered undivided chuck 6 through the bore 7 of which the hollow drill steel 8 is inserted into position to have its tionalshape of the drill steel.

An elastic washer 9 is located within the flaring borefiof the'front head and is in- Specification of Letters Patent. Patented llliay 1(5, 1911, Application filed February 24, 1909. Serial No. 479,815.

terposed between the outer end of the chuck 6 and a nut IO-haVing a screw threaded engagement with the outer end of the said front head. To protect the elastic washer 9 from injury when the drill steel is inserted into position, a ring 11 is interposed between the outer end of the elastic washer 9 and the nut '10. The bore 12 of the elastic washer 9 is made to conform to the cross sectional shape of the drill steel as is also the bore 13 of the protecting ring 11. This bore 13 is also made flaring so as to facilitate the insertion of the drill steel 8 into position.

The chu k 6, elastic washer .9 and. pro tecting ring 11 are interlocked against ro tary movement with respect to the front head 3 as, for instance, by making the chuck,

the elastic washer and the ring elongated in cross section and making the flaring bore 5 of the front head to conform to the said parts.

The nut 10 is yieldingly held in any of its rotatively adjustable positions, as, for instance, by providing an expanding band spring 14 interposed between the periphery of the fronthead and the inner wall of the nut 10.

A cup washer 15 is located around the head of the anvil block 2 to'form a fluid tight packing to prevent the pressure fluid from working back into the hammer cylinder.- A pressure fluid chamber. 16 surrounds the head of the anvil, block 2. The bore 17 I munication at all times with this chamber.

16 through a duct 18 in the head of the anvil block. Apressure fluid supply pipe 19 is secured to a hole 20 in the side wall of the front head in communication with the chamber 16.

In operation, the nut 10 is unscrewed sufiiciently to release the pressure upon the elastic washer 9.. The drill steel 8 may then be inserted into position. The nut 10 is then screwed up sutliciently to expand the elastic washer 9 to form a fluid tight packing around the drill steel. This pressure also serves to drive the chuck 6 inwardly into its seat within the flaring bore 5 of the front head so that all wear between these ,parts is taken up.

What I claim is 1 1. A suitable holder, a chuck therein, a

l'he liolileifor coming the Weaker to gr-i file steel encl e eoteeting ring inte'zrywe eel-Ween fihewaser and nut, so-id. protect- 1 foo facilitate the inserlion of the dri l steel amen.

.t a, leperefl. olmel zend enfelestic Washer both sea-teal iilereiai', flrill' sleel, a. not engaging the Joelleiior; the check and washer inwertll lo be? e 11;? Weave en the chalk and to sense the wesliee'to i llie, steel.

suitable homer e flaring em,

a aperel eltmol eml on elastic washer and promoting .h 11g; all seelefl therein a :lwillengaging the liolcler for forcing the chuck and Washer inwardly to take up Wear on the chuck. mil to muse the Washer to grip the steel,

5. A Suitable holder having a flaring bore, a tape/mil shock and. an eleslie washer b05211 swiei therein, am! leaving an interlocking engagement with lhe holder against rotary movement "Willi respect thereto, a clrill Rteel and e not engaging the holder for fofiellng the chuck mid Washer inwardly to take up wear on the ehuek and cause the washer to grip the steel.

6. .1. suitable holder having e flaring bore, a tapereol chuck, an elastic Washer and a protecting ring ell seabed therein and haw ing an in'i'zerloekiiig engagement with the holder against rotery movement "with respecis 'lhere'co, a, drill steel and a not engaging the holcler' for forcing the chuck; Washer and inwardly to take up Wear on the chuck and to cause the washer to grip the steel.

7, In a hammer drill, a front head having 2: pressure fluid chamber therein, an anvil block, a chuck seated in the Tent head, a. hollow drill steel in open communioation with the said chamber, an elastic Washer surhovlng its bore made fiel'ln sons faleel' e ml a WiESlAfiI s11 oiteble holcler having a flaring bore,

- nut engagin eee eee roundin the clzill steel; means for causing the was. .er to grip the steel to prevent the leakage of the press 12o fluid around the unding the head of the anvil block for preventing the leakage of the pigessure fluidto the hammer o linder.

'8. A suitable holder having a attained fiarin bore encl a flattened tapered chuck seete therein.

9. A suitable holder having a flarin bore,

a tapered undivided chuck seated t erein' end means fol" forcing the cheek inwardly to belie up weer thereon.

10. A suimble hol-cler having efierimlmre,

e mpere undivided chuck sealed lexei'n end-a1 me engaging tllel iololer for forcing the chuck inwardly to take up "weer thereon,

11. A suitable bolder having allowing bore, a tapered undivided chuck seated therein, a the holder forlorcing the chuck inwar ly to take up Wear thereon and means for locking the nut to the holder against unintentional displacement 12; A sfiitable holder having a flaring bore, 0. tapered undivided chuck seated (therein and interloekeclagainst rotary movement with respecz thereto, and means for forcing the chuck inwardly to take up weer theren..

l3. A suit-able holder having a flaring bore, a laperecl undivided chuck seated therein and interlocked against mi ery movefnent with respect thereto and a, nut engaging the holder for forcing the chuck in- Warclly to lake up W832 thereon.

1%. A suitable holder having a flaring bore a tapered undivided chuck seated "chesgein. and interlocked against rotary movement with respect thereto a nut engaging the holder for forcing the clmcl'c-inwerdly to take up wear thereon and means for looking; the nut To the holder against unintem tional displacement.

In testimony that I claim the foregoing my invention, I have signefi my meme in presence of two witnesses, this twentieth day of February 1909.

' ALBERT l'cl'. TAYLUR,

I witnesses:

RUSFSELL H. Winn-ELM, CHAS. B, Bowman. 

